getMatchingData

Utility routine which fetches the subset of data items in this
list model that starts with the given prefix specified.
Note that if the prefix is an empty string, "", then all items will be
returned. If there are no items that start with the specified
prefix, an empty array will be returned.

findCommonPrefix

Utility routine to find the common prefix of ListDataItems
the data list that begin with the specified name. As with
findClosestDataItem(), the name of the
ListDataItem used is what is returned by
getName().

If there are no items that start with the specified name, an empty
(zero-length) String will be returned.